[Click] Questions of Click's Source Elements

[betamaz]

Hi,

Can anyone explain to me why many source elements in click (such as 
FastUDPFlows, FastTCPFlows, FastUDPSource) require that the ethernet address 
of both source and destination to be specified? It seems to me that forcing 
the user to include the ethernet address of the destination creates a lot of 
unnessary work (might even hinder the sender).


Second, what type of packets do RatedSource, RandomSource, InfiniteSource 
create? They're not IP packets. Based on the info I got using ethereal I 
think they're eth2 type packets.

Thanks a bunch,
Bita.